/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.storageengine.dataregion.wal;

import org.apache.iotdb.db.conf.IoTDBConfig;
import org.apache.iotdb.db.conf.IoTDBDescriptor;
import org.apache.iotdb.db.storageengine.dataregion.wal.node.IWALNode;
import org.apache.iotdb.db.storageengine.dataregion.wal.node.WALFakeNode;
import org.apache.iotdb.db.storageengine.dataregion.wal.utils.WALMode;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class DisableWALTest {
  private static final IoTDBConfig config = IoTDBDescriptor.getInstance().getConfig();
  private WALMode prevMode;

  @Before
  public void setUp() throws Exception {
    prevMode = config.getWalMode();
    config.setWalMode(WALMode.DISABLE);
  }

  @After
  public void tearDown() throws Exception {
    config.setWalMode(prevMode);
    WALManager.getInstance().clear();
  }

  @Test
  public void testDisableWAL() {
    WALManager walManager = WALManager.getInstance();
    IWALNode walNode = walManager.applyForWALNode("");
    assertEquals(WALFakeNode.getSuccessInstance(), walNode);
  }
}
